Question

我想说的是，如果定义了makeCodeNumber并且不是null，请使用此

<cfpdfformparam name="make" value="#session.checkout.vehicle.makeCodeNumber#">

但如果它为null（或为空）则使用此

<cfpdfformparam name="make" value="#session.checkout.vehicle.vehiclemake#">

所有代码

<cfif isDefined("session.checkout.vehicle.makeCodeNumber")>
  <cfif len(trim("session.checkout.vehicle.makeCodeNumber"))>
    <cfpdfformparam name="make" value="#session.checkout.vehicle.makeCodeNumber#">
  <cfelse>
    <cfpdfformparam name="make" value="#session.checkout.vehicle.vehiclemake#">
  </cfif>
</cfif>

当我转储变量时，我显示它是null（或空字符串）但由于某种原因我必须忽略某些东西，因为当它为null时它仍然只是<cfpdfformparam name="make" value="#session.checkout.vehicle.makeCodeNumber#">而不是{{1 }}

非常感谢任何帮助！

Answer 1

您正在评估字符串“session.checkout.vehicle.makeCodeNumber”的len(trim())而不是变量session.checkout.vehicle.makeCodeNumber的值。您需要在第二个if语句中删除"

<cfif isDefined("session.checkout.vehicle.makeCodeNumber")>
  <cfif len(trim(session.checkout.vehicle.makeCodeNumber))>
    <cfpdfformparam name="make" value="#session.checkout.vehicle.makeCodeNumber#">
  <cfelse>
    <cfpdfformparam name="make" value="#session.checkout.vehicle.vehiclemake#">
  </cfif>
</cfif>

如果在ColdFusion中为null语句

1 个答案: